Electrodeposited AgAu nanoalloy enhancing photoelectric conversion efficiency of dye sensitized solar cells
Electrochimica Acta(2019)
摘要
Localized surface plasma resonance (LSPR) is one important spectroscopic feature of noble metal nanoparticles. In this paper, 10 nm-scaled AgAu nanoalloys were deposited by in-situ electrodeposition and replacement reaction in the mesoporous TiO2 electrode of dye sensitized solar cells. The efficiency of DSSC with Ag0·78Au0.22 nanoalloy was increased from 7.47% to 8.71% compared with the pure TiO2 DSSC. It's mainly due to the enhanced photocurrent and open circuit voltage. The increased light absorption of photoelectrode from the LSPR effect of AgAu nanoalloys can enhance photocurrent. While the open circuit voltage was promoted by more negative potentials of AgAu nanoalloys. By controlling the mass ratio of Ag/Au, the effects of AgAu nanoalloys in optical and photoelectric properties of DSSC was further investigated. These findings can provide a fundamental understanding of charge generation and transport in photoelectrochemical device incorporating noble metal nanoparticles, and offer a helpful guidance for solar water splitting, photocatalytic hydrogen production, seawater desalination and other photoelectrochemical fields.
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关键词
AgAu nanoalloy,Electrodeposition,Localized surface plasma resonances,Dye sensitized solar cell
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